<template>
  <div class="red-screen">
    <!-- 红色背景容器 -->
  </div>
</template>

<script>
import { defineComponent } from 'vue'

export default defineComponent({
  name: 'TestComponent'
})
</script>

<style scoped>
.red-screen {
  width: 100vw;
  height: 100vh;
  background-color: red;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9999;
}
</style>